COMPACT AND EXTENSIBLE RING MAIN UNIT. insulated Ring Main Unit with load break switch or integrated vacuum circuit breaker

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1 DR-6/DT-6 COMPACT AND EXTENSIBLE RING MAIN UNIT BUILT TO LAST! DR-6/DT-6 Compact and/or extensible SF 6 insulated Ring Main Unit with load break switch or integrated vacuum circuit breaker SAFETY, RELIABILITY, VERY COMPACT AND INSENSIBLE TO THE ENVIRONMENT IN THE FIELD OF ELECTRICITY DISTRIBUTION FROM 6 TO 24 KV. THE SPECIALIST IN MEDIUM VOLTAGE SWITCHGEAR - info@switchgearcompany.eu

2 DR-6/DT-6 DEVELOPMENT AND MANUFACTURING PHILOSOPHY SGC nv invested important R&D human and financial resources in developing the new SF6 insulated compact and extensible medium voltage ring main unit for 12, 17,5 and 24 kv. Answering the most severe quality and environmental requirements, the production process of the DR-6/DT-6 range is made with the newest developed laser machinery that was installed for the sole purpose to insure a permanent quality and reliability. The DR-6/DT-6 range was developed and is produced in line with the ISO 9001 requirements. Security, reliability, environmental respect are characterizing the DR-6/DT-6 range of cubicles of which most of the components are recyclable. BUILT TO LAST! Laser welding Robot Bending cell Leak detector DR-6/DT-6 FIELD OF APPLICATION DR-6/DT-6 switchgears are used in number of applications combining all possible functions, protecting transformers up to 2500 kva in all concepts of networks. The city distribution, rural distribution, renewable energy applications, small factories, shopping malls, hospitals may be part of the possible field of application of the DR-6/DT-6 range of products.

3 DR-6/DT-6 DIMENSIONS AND DESCRIPTIONS DR-6C /DR-6E COMPACT - NON EXTENSIBLE / EXTENSIBLE RING MAIN UNITS DR-6C 2K DR-6C 2KT DR-6E-2KT DR-6C 2K2T I>I>> I>I>> DR-6C 3KT DR-6C 2KD DR-6E-2KD DR-6C 3KD DR-6E EXTENSIBLE FUNCTIONAL UNITS I>I>> FUNCTION DESCRIPTION K - Incoming/ outgoing cubicle T - Fuse protection cubicles (combined D - Circuit breaker cubicle C - Metering cubicle SF 6 insulated DR-6 2E K DR-6 2E T DR-6 2E D DR-6 2E C DR-6C/DR-6E COMPACT - NON EXTENSIBLE/ EXTENSIBLE RING MAIN UNITS Type Height Width Depth Weight DR-6C 2K 1410 mm 600 mm 720 mm 280 kg DR-6C 2KT 1410 mm 950 mm 720 mm 450 kg DR-6E 2KT 1460 mm 950 mm 720 mm 470 kg DR-6C 2K2T 1410 mm 1300 mm 720 mm 640 kg DR-6C 3KT 1410 mm 1250 mm 720 mm 600 kg DT-6C 2KD 1420 mm 950 mm 838 mm 530 kg DT-6E 2KD 1460 mm 950 mm 838 mm 550 kg DT-6C 3KD 1460 mm 1250 mm 838 mm 660 kg The multifunctional units are always extendable in both directions. DR-6E EXTENSIBLE FUNCTIONAL UNITS Type Height Width Depth Weight DR-6E K 1460 mm 300 mm 720 mm 140 kg DR-6E T 1460 mm 350 mm 720 mm 180 kg DR-6E D 1460 mm 350 mm 720 mm 210 kg DR-6E C 1460 mm 500 mm 720 mm 240 kg The functional units are always extendable to the left or the right of the multifunctional unit.

4 ELECTRICAL CHARACTERISTICS Rated voltage kv General specifications Impulse withstand voltage 1,2 / 50 µsec. To earth and between phases kv Over the insulation distance kv Power frequency voltage test 1 min. To earth and between phases kv Over the insulation distance kv Rated frequency Hz 50/60 Rated current A /630 Rated short time current 1 sec. ka ,5/16/20 Rated peak value of the current kâ /50 Breaking capacity (IEC ) Class E3 Rated current A /630 Closed loop A /630 No load cable A Earth leakage fault A Internal arc 1 sec. IEC (5 criteria) ka Degree of protection HV-compartment IP6X LV- and cable compartment IP4X Rated gas pressure at 20 C Bar 0.3 bar overpressure Line Feeder Rated current A Rated short time current 1 sec. ka ,5/16/20 Rated peak value of the current kâ ,5/40/50 Transformer feeder Rated current A Fuse switch Short circuit breaking capacity (limited by the fuse) ka /20 Making capacity kâ /50 Circuit breaker Short circuit breaking capacity 1 sec. ka Making capacity kâ Number of makings 5 FUSE SELECTION TABLE Standard kv Power of the distribution transformer (kva) UTE DIN DIN

5 DESCRIPTION OF THE MAIN COMPONENTS OF THE DR-6C/DT-6C AND DR-6E/DT-6E The DR-6/DT-6 range offers a compact, safe, reliable and economical design, free of any possible environmental aggression. Extensions on site are at any time possible without any special tooling nor particular surrounding conditions. The components Load break switch Circuit breaker The three position load break switch (ON / OFF / Earth) is in accordance with the IEC requirements. The concept insures a natural interlock of the primary functions of the cubicle. The arc extinction is insured by the SF 6 gas, associated to a short arcing time due to an optimized opening speed of the mechanical drive and a patented arc blowing principle that combines optimal revolution of the gas with perfect electrical contacts. Deba s experience in the load break switch RV44 of the DF-2 range finds here a perfect application. It is of the class E3/M1 (100 CO and 1000 mechanical operations) following IEC The SGC ISM-086 vacuum circuit breaker (VCB) of the magnetic actuator type uses the latest vacuum interrupter technology. The VCB can only be closed electrically, mechanical closing is not possible (*). The VCB can be opened manually as electrically. The circuit breaker operates through a control module and a self powered digital protection relay RP600, together with the three CT s allowing the detection of over-current and earth faults failures. (*) In absence of auxiliairy voltage, a hand operated generator can be used. The fuse holders The fuse holders are made for HRC fuses of the DIN and UTE type for voltages of 10, 17,5 and 24 kv. A simple intelligent artifice allows the change without any particular tooling. Fuse holders are made from epoxy with a non-losable cover, and a fuse supporting structure firmly fixed to the cover. Earthing on both sides of the fuses is clearly marked on the synoptic diagram. The fuse holder is water tight and tested in accordance with the IEC standards. The access to the fuse holders is facilitated by a simple and logic interlock system allowing the opening of the door only after earthing of the cubicle. The mechanical drives Deba Components mechanical drives have already been subject to intensive tests and usage in the DF-2 range of products. The same design has been implemented in the DR-6/DT-6. The steel used for the drives has been chosen because of their high tensile force, toughness and resistance to bending. The mechanical drive accommodates both the operating axles (LBS and earth) and the interlocks. The spring type drive is operating independently of the operator and does not allow any function violation. The switch position indicator shows at any time the real status of the switch. The forces needed to control the mechanism are low which results in a high user-friendliness. The drive can be motorized and can receive a number of options, allowing remote control, remote position indication and integration into a SCADA operated network.

6 Cable connection The cables are connected to the cubicles by means of bushings with M16 screwed contacts and for connectors according to EN / DIN 50 standards. They may be of the type A / B or C (200, A). They are defined in function of their applications. The cable compartment size allows one connector per bushing with a maximum of 400 mm 2 per cable (On request, lightning arrestors can also be accommodated in the cable box as well as two cables per bushing). The extensibility concept Extensibility of the ring main unit is ensured by top placed bushings of the C- type. An insulated and screened extension device connects the two sets to be extended. Extension requires no special tooling nor special on site condition. The bushings are directly molded on a stainless steel plate avoiding any risk of leakage caused by mechanical assembly. The synoptic diagram and the accessories A clear, logic and well understandable synoptic diagram is placed in front of each of the functions. This diagram also supports the voltage indicator of the type HR-3, showing the presence of the voltage on the cables and allowing the use of phase concordance units. Short circuit indicators can find their place in the LV compartment and the associated ring type CT s in the cable box. Complementary accessories can be accommodated in a well designed LV box to be placed on the top of the concerned function(s). Protection relay The self powered digital protection relay has a wide range of protection functions, is equipped with 4 outgoing contact points and 2 free programmable outgoing points. The relay functions are easy accessible and programmable with the help of a laptop or with the support of the menu oriented interface RP600 The enclosure The stainless steel enclosure is manufactured on brand new, up to date machines associating lasercutting, robotised bending and 3-D laser welding. The welded tank is sealed for life and tested under vacuum, in strict conditions with experienced equipment. The enclosure accommodates the life components and is foreseen of a rupture disk avoiding any problem in the improbable case of an internal overpressure. Applicable standards IEC AC metal enclosed switchgear and controlgear above 1kV up to 52 kv IEC HV AC disconnectors and earthing switches IEC HV AC Fuse switch combination IEC HV AC circuit breakers IEC Common specifications for HV switchgear and controlgear IEC Voltage detection systems (VDS)

7 DR-6 DESCRIPTIONS LBS operating axle Position indicator Release rotary button Earthing switch operating axle Synoptic diagram Voltage indicator Cable compartment Acces door DT-6 DESCRIPTIONS Circuit breaker tripping axle Operation button circuit breaker Pressure indicator Protection relay LBS operating axle Position indicator Earthing switch operating axle Voltage indicators (VDS) Acces door to cable compartment

8 SGC, the name of permanent safety in medium voltage SGC has been supplying reliable products for the distribution of electricity for more than 30 years. Innovative thinking and environmental sensibility is the most important driving force at SGC. In the development of complete solutions there is a minimum use of components all of which have an exceptional life expectancy. The SGC organisation stands for exceptional quality and is customer orientated. The customer specifications and targets are our main concern. With the use of an exclusive factory with high automation production lines we are developing state of the art components and systems. This enables us to develop the DF-2, DR-6/DT-6, DF-3 and DW-2 to the highest quality standards When it comes to delivery times, prices and products SGC delivers on its promises. SGC nv Moorstraat 24 B-9850 Nevele Belgium +32 (0) (0) Internet: info@switchgearcompany.eu THE SPECIALIST IN MEDIUM VOLTAGE SWITCHGEAR DW648311